Studies on Adjustable Lug Type Traction Aid for Farm Tractor (Part 1)

On the Fundamental Functions

Abstract

This report is a developmental study on a traction aid of adjustable lug type that consists of a four-bar constrained chain mechanism. The device is mounted on the outside of both driving rear wheels of tractor, and its degree of action is operated by the hydraulic force of the tractor.
Intended advantages of the device are listed as follow. Appropriate shape of lugs and their angle of action can be chosen according to field conditions; Their control is easy and speedy either on field or on road, or in running on soft ground; Adjustment of inclination of tractor body is possible while driving on sloping land, which leads to prevention of sideslips and roll over accidents; The device assists easy escape of tractor from standstill due to sinkage; Soil compaction is reduced both in soil preparation and in running between crop rows; Due to lug action, high traction is achieved and trafficability is secured even on soft field conditions.
In this first report, the principle of adjusttable lug mechanism and its fundamental functions are presented. Field performances will be discussed in the next report.